ena: Update driver version to v2.8.3

Features:

• Report RX overrun errors via sysctl hw stats

Bug Fixes:

• Budget rx descriptors, not packets, to fix jumbo frame throughput

Minor Changes:

• pmap_change_attr void * API change for FreeBSD 16.0+
• Adjust ena_[rt]x_cleanup to return bool

MFC after: 2 weeks
Sponsored by: Amazon, Inc.
Differential Revision: https://reviews.freebsd.org/D56641